From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Summary sheet detailing the specifications for manufacturing Hypoid Gears, summary number 823.
| Identifier | ExFiles\Box 92\5\ scan0152 | |
| Date | 28th September 1937 | |
| FORM *ED{J. L. Edwards} 641 HYPOID GEARS SUMMARY NO. 823 GLEASON WORKS ROCHESTER N.Y. U.S.A. CONCAVE (GEAR TOOTH BEARING) CONVEX (GEAR TOOTH BEARING) FOR: ROLLS ROYCE LTD. COMBINATION: 8x34 GEAR PITCH: 34 GEAR FACE: 1.750" GEAR CONE DISTANCE: 5.146" MADE OUT: S. M.{Mr Moon / Mr Moore} Gover DATE: Sept. 28. 1937 DRIVE PRESSURE ∠: 18° 15' REVERSE PRESSURE ∠: 24° 15' SPIRAL ∠: GEAR 33° 36' PINION 44° 57' OFFSET OF PINION BELOW CENTER: .850" CHECKED: E.{Mr Elliott - Chief Engineer} Warner DATE: Sept. 29. 1937 GENERAL DIMENSIONS No | ITEM | PINION | GEAR 1 | PART NUMBER 2 | ADDENDUM | .104" 3 | WORKING DEPTH | .489" 4 | WHOLE DEPTH | .552" | .550" | FACE ANGLE | 18° 16' | 77° 30' | PITCH ANGLE | 13° 55' | 76° 20' | ROOT ANGLE | 12° 16' | 71° 23' | DEDENDUM ANGLE | 4° 57' | OUTSIDE DIAMETER | 3.497" | 10.049" | CONE CENTER TO CROWN | 5.297" | 1.115" | CONE CENTER TO BACK | 5.730" | 2.387" | NORMAL CHORD. ADDEN * | .330" | .087" | NORMAL CHORD. THICK * | .419" | .221" | HAND OF SPIRAL | L | R | CUTTING METHOD | FIXED SETTING | SPREAD BLADE | MOUNTING DISTANCE | 5.313" | 2.525" | SOFT MOUNTING DISTANCE | 5.316" | DRIVER PINION ROTATION | C.W. PINION CUTTER SPECIFICATIONS 23 | ROUGH | DIAMETER 9" | PT. WIDTH .090" | I.B.∠ 18° | O.B.∠ 24° 24 | FINISH | 9"** | .130" | (Data in item 83) CUSTOMER'S ORDER NO: SALES ORDER NO: NO. OF PAIRS: DATE: GEAR SETTINGS 15" GEAR ROUGHER 26 | MACHINE ROOT ∠ | 71° 23' 27 | MACH. CENTER TO BACK ROUGH | 2.387" 28 | HORIZONTAL | OUT UP | 2.346" 29 | ANGULAR ROUGH | 16° 45' 30 | CUTTER AXIAL ROUGH ADV. | .010" 15" SPIRAL GENERATOR FINISH 31 | MACHINE ROOT ∠ | 71° 23' 32 | MACH. CENTER TO BACK FINISH | 2.610" 33 | HORIZONTAL | OUT UP | 1.849" 34 | VERTICAL | 3.748" 35 | CUTTER AXIAL ∠ POS. ADV. | .211" 38 | 3/10... RATIO CHANGE GEARS NC-75 | DRIVER: 37, STUD DRIVEN: 67 | DRIVER: 47, STUD DRIVEN: 83 40 | TEST ROLL | 30° CRADLE 3/16" WORK PINION ROUGHING SETTINGS ROUGHING CUTTER SPECIFICATIONS 57 | DIAMETER 9.500" | PT. WIDTH .060" | I.B.∠ 26° | O.B.∠ 17° 58 | MACHINE ROOT ∠ | 12° 16' 59 | MACHINE. CENTER TO BACK | 5.878" 60 | CUTTER AXIAL ∠ POS. ADV. | .010" 15" SPIRAL BEVEL ROUGHER SETTINGS 61 | HORIZONTAL | OUT | 1.914" WITH 62 | ANGULAR | DOWN | 15° 7' ADV. 15" HYPOID GENERATOR SETTINGS 63 | HORIZONTAL | OUT | 1.464" 64 | VERTICAL | DOWN | 3.389" 65 | OFFSET OF BLANK | 0 66 | CUTTER SPINDLE ∠ | 0 67 | CUTTER COLUMN ∠ | 0 79 | 3/10... RATIO CHANGE GEARS...NC-75 | DRIVER: 55, STUD DRIVEN: 49 | DRIVER: 70, STUD DRIVEN: 63 80 | TEST ROLL | 20°CRADLE 83°9'WORK PINION FINISHING SETTINGS BOTTOM | No 16 HYPOID GENERATOR FINISHING | TOP 81 | MACHINE ROOT ∠ | 12° 16' | 12° 16' 82 | MACH. CENTER TO BACK | 5.162" | 5.516" 83 | CUTTER BLADES | #21-17 1/2°-O.B. | #48-25°-I.B. 84 | POINT DIAMETER | 8.380" | 9.460" 85 | OFFSET OF BLANK | .984" | .765" 86 | SLIDING BASE POS. | WITH .150" | WITH .400" 87 | RADIAL | OUT .911" | OUT 2.411" 88 | VERTICAL | DOWN 4.042" | DOWN 2.959" 89 | CRADLE ∠ | UP 0° 1' | DOWN 3° 22' 90 | SWIVEL ∠ | | IN 3° 8' RATIO CHANGE GEARS (FINISHING) BOTTOM | DRIVER: 83, STUD DRIVEN: 72 | DRIVER: 89, STUD DRIVEN: 77 TOP | DRIVER: 80, STUD DRIVEN: 69 | DRIVER: 89, STUD DRIVEN: 77 V & H CHECK: GEAR WITH ........ PINION (Table is blank) TEST ROLL (FINISHING) 20°CRADLE 88°9'WORK | 20°CRADLE 89°20'WORK NOTES: * THICKNESS MEASUREMENTS ARE TAKEN AT MIDDLE OF FACE ** SPECIAL 12° BLADE CUTTER IS REQUIRED TO CUT GEAR #1 DUE TO LONG FACE BACKLASH ALLOWED: .008"-.010" UNDEVELOPED SETTINGS NOTE: THIS SUMMARY PROVIDES CUTTER CLEARANCE FOR #408 | ||